diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index efe4103..f131fbd 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -41,8 +41,7 @@ jobs:
         shell: bash -l {0}
         run: |
           conda install -y -q \
-            flake8 \
-            pytest pytest-flake8 pytest-xdist pytest-openfiles pytest-cov
+            pytest pytest-xdist pytest-openfiles pytest-cov
 
       - name: List installed packages
         shell: bash -l {0}
diff --git a/.github/workflows/build_docs.yaml b/.github/workflows/build_docs.yaml
new file mode 100644
index 0000000..d6c0577
--- /dev/null
+++ b/.github/workflows/build_docs.yaml
@@ -0,0 +1,48 @@
+name: docs
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  build_sphinx_docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          # Need to clone everything for the git tags.
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: '3.10'
+          cache: "pip"
+          cache-dependency-path: "setup.cfg"
+
+      - name: Install sqlite
+        run: sudo apt-get install sqlite libyaml-dev
+
+      - name: Update pip/wheel infrastructure
+        run: |
+          python -m pip install --upgrade pip
+          pip install wheel
+
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+
+      - name: Build and install
+        run: pip install --no-deps -v .
+
+      - name: Install documenteer
+        run: pip install 'documenteer[pipelines]>0.8,<0.9'
+
+      - name: Build documentation
+        env:
+          DAF_BUTLER_MIGRATE_DIR: .
+          DAF_BUTLER_MIGRATE_MIGRATIONS: ./migrations
+        working-directory: ./doc
+        run: package-docs build -n -W
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index 796ef92..6c463ee 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -9,3 +9,8 @@ on:
 jobs:
   call-workflow:
     uses: lsst/rubin_workflows/.github/workflows/lint.yaml@main
+  ruff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: chartboost/ruff-action@v1
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ee17455..dbfb184 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -6,7 +6,7 @@ repos:
       - id: end-of-file-fixer
       - id: trailing-whitespace
   - repo: https://github.com/psf/black
-    rev: 23.1.0
+    rev: 23.3.0
     hooks:
       - id: black
         # It is recommended to specify the latest version of Python
@@ -19,7 +19,8 @@ repos:
     hooks:
       - id: isort
         name: isort (python)
-  - repo: https://github.com/PyCQA/flake8
-    rev: 6.0.0
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    # Ruff version.
+    rev: v0.0.277
     hooks:
-      - id: flake8
+      - id: ruff
diff --git a/pyproject.toml b/pyproject.toml
index 29ac6eb..205016e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,3 +63,46 @@ line_length = 110
 
 [tool.lsst_versions]
 write_to = "python/lsst/daf/butler_migrate/version.py"
+
+[tool.ruff]
+exclude = [
+    "__init__.py",
+    "migrations/*/*.py",
+]
+ignore = [
+    "N802",
+    "N803",
+    "N806",
+    "N812",
+    "N815",
+    "N816",
+    "N999",
+    "D107",
+    "D105",
+    "D102",
+    "D104",
+    "D100",
+    "D200",
+    "D205",
+    "D400",
+]
+line-length = 110
+select = [
+    "E",  # pycodestyle
+    "F",  # pycodestyle
+    "N",  # pep8-naming
+    "W",  # pycodestyle
+    "D",  # pydocstyle
+    "UP",
+    "C4",
+]
+target-version = "py310"
+extend-select = [
+    "RUF100", # Warn about unused noqa
+]
+
+[tool.ruff.pycodestyle]
+max-doc-length = 79
+
+[tool.ruff.pydocstyle]
+convention = "numpy"
diff --git a/python/lsst/daf/butler_migrate/butler_attributes.py b/python/lsst/daf/butler_migrate/butler_attributes.py
index 0f500db..e0629e1 100644
--- a/python/lsst/daf/butler_migrate/butler_attributes.py
+++ b/python/lsst/daf/butler_migrate/butler_attributes.py
@@ -111,7 +111,7 @@ def update(self, name: str, value: str) -> int:
         return self._connection.execute(sql).rowcount
 
     def update_manager_version(self, manager: str, version: str) -> None:
-        """Convenience method for updating version for the specified manager.
+        """Update version for the specified manager.
 
         Parameters
         ----------
@@ -163,7 +163,7 @@ def get_dimensions_json(self) -> dict[str, Any]:
         return config
 
     def update_dimensions_json(self, update_config: Callable[[dict], dict]) -> None:
-        """Updates dimensions definitions in dimensions.json.
+        """Update dimensions definitions in dimensions.json.
 
         Parameters
         ----------
diff --git a/python/lsst/daf/butler_migrate/config.py b/python/lsst/daf/butler_migrate/config.py
index fc98136..2b5e5a4 100644
--- a/python/lsst/daf/butler_migrate/config.py
+++ b/python/lsst/daf/butler_migrate/config.py
@@ -23,7 +23,7 @@
 
 import logging
 import os
-from typing import Any, Dict, Optional
+from typing import Any
 
 from alembic.config import Config
 
@@ -42,11 +42,11 @@ def from_mig_path(
         cls,
         mig_path: str,
         *args: Any,
-        repository: Optional[str] = None,
-        db: Optional[database.Database] = None,
-        single_tree: Optional[str] = None,
-        one_shot_tree: Optional[str] = None,
-        migration_options: Optional[Dict[str, str]] = None,
+        repository: str | None = None,
+        db: database.Database | None = None,
+        single_tree: str | None = None,
+        one_shot_tree: str | None = None,
+        migration_options: dict[str, str] | None = None,
         **kwargs: Any,
     ) -> MigAlembicConfig:
         """Create new configuration object.
diff --git a/python/lsst/daf/butler_migrate/migrate.py b/python/lsst/daf/butler_migrate/migrate.py
index 5c68720..ba6af8c 100644
--- a/python/lsst/daf/butler_migrate/migrate.py
+++ b/python/lsst/daf/butler_migrate/migrate.py
@@ -22,7 +22,6 @@
 from __future__ import annotations
 
 import os
-from typing import Dict, List, Optional
 
 
 class MigrationTrees:
@@ -44,7 +43,7 @@ class MigrationTrees:
     """Name of envvar for location of a package containing default migrations.
     """
 
-    def __init__(self, mig_path: Optional[str] = None):
+    def __init__(self, mig_path: str | None = None):
         if mig_path is None:
             self.mig_path = self.migrations_folder()
         else:
@@ -139,7 +138,7 @@ def one_shot_version_location(self, one_shot_tree: str, *, relative: bool = True
             path = os.path.join(self.mig_path, path)
         return path
 
-    def regular_version_locations(self, *, relative: bool = True) -> Dict[str, str]:
+    def regular_version_locations(self, *, relative: bool = True) -> dict[str, str]:
         """Return locations for regular migrations.
 
         Parameters
@@ -154,7 +153,7 @@ def regular_version_locations(self, *, relative: bool = True) -> Dict[str, str]:
             Dictionary where key is a manager name (e.g. "datasets") and value
             is the location of a folder with migration scripts.
         """
-        locations: Dict[str, str] = {}
+        locations: dict[str, str] = {}
         for entry in os.scandir(self.mig_path):
             if entry.is_dir() and entry.name not in ("_alembic", "_oneshot"):
                 path = entry.name
@@ -163,7 +162,7 @@ def regular_version_locations(self, *, relative: bool = True) -> Dict[str, str]:
                 locations[entry.name] = path
         return locations
 
-    def one_shot_locations(self, manager: Optional[str] = None, *, relative: bool = True) -> Dict[str, str]:
+    def one_shot_locations(self, manager: str | None = None, *, relative: bool = True) -> dict[str, str]:
         """Return locations for one-shot migrations for specific manager.
 
         Parameters
@@ -180,7 +179,7 @@ def one_shot_locations(self, manager: Optional[str] = None, *, relative: bool =
             Dictionary where key is a one-shot tree name and value is the
             location of a folder with migration scripts.
         """
-        locations: Dict[str, str] = {}
+        locations: dict[str, str] = {}
 
         one_shot_loc = os.path.join(self.mig_path, "_oneshot")
         if not os.access(one_shot_loc, os.F_OK):
@@ -205,7 +204,7 @@ def one_shot_locations(self, manager: Optional[str] = None, *, relative: bool =
                     locations[manager + "/" + entry.name] = path
         return locations
 
-    def version_locations(self, one_shot_tree: Optional[str] = None, *, relative: bool = True) -> List[str]:
+    def version_locations(self, one_shot_tree: str | None = None, *, relative: bool = True) -> list[str]:
         """Return list of folders for version_locations.
 
         Parameters
diff --git a/python/lsst/daf/butler_migrate/script/migrate_add_tree.py b/python/lsst/daf/butler_migrate/script/migrate_add_tree.py
index 4f4fc6a..1deba2e 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_add_tree.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_add_tree.py
@@ -64,7 +64,6 @@ def migrate_add_tree(tree_name: str, mig_path: str, one_shot: bool) -> None:
     all trees the root of the tree is labelled with the manager name (e.g.
     "datasets").
     """
-
     trees = migrate.MigrationTrees(mig_path)
 
     manager = tree_name
diff --git a/python/lsst/daf/butler_migrate/script/migrate_current.py b/python/lsst/daf/butler_migrate/script/migrate_current.py
index 3d59f16..6f525e0 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_current.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_current.py
@@ -25,7 +25,6 @@
 from __future__ import annotations
 
 import logging
-from typing import Optional
 
 from alembic import command
 
@@ -34,7 +33,7 @@
 _LOG = logging.getLogger(__name__)
 
 
-def migrate_current(repo: str, mig_path: str, verbose: bool, butler: bool, namespace: Optional[str]) -> None:
+def migrate_current(repo: str, mig_path: str, verbose: bool, butler: bool, namespace: str | None) -> None:
     """Display current revisions for a database.
 
     Parameters
diff --git a/python/lsst/daf/butler_migrate/script/migrate_downgrade.py b/python/lsst/daf/butler_migrate/script/migrate_downgrade.py
index 5cdfeac..4195c38 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_downgrade.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_downgrade.py
@@ -25,7 +25,6 @@
 from __future__ import annotations
 
 import logging
-from typing import Optional
 
 from alembic import command
 
@@ -35,7 +34,7 @@
 
 
 def migrate_downgrade(
-    repo: str, revision: str, mig_path: str, one_shot_tree: str, sql: bool, namespace: Optional[str]
+    repo: str, revision: str, mig_path: str, one_shot_tree: str, sql: bool, namespace: str | None
 ) -> None:
     """Downgrade schema to a specified revision.
 
@@ -71,7 +70,7 @@ def migrate_downgrade(
             "Alembic version table does not exist, you may need to run `butler migrate stamp` first."
         )
 
-    one_shot_arg: Optional[str] = None
+    one_shot_arg: str | None = None
     if one_shot_tree:
         one_shot_arg = one_shot_tree
     cfg = config.MigAlembicConfig.from_mig_path(mig_path, repository=repo, db=db, one_shot_tree=one_shot_arg)
diff --git a/python/lsst/daf/butler_migrate/script/migrate_dump_schema.py b/python/lsst/daf/butler_migrate/script/migrate_dump_schema.py
index 01c5669..8980e0d 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_dump_schema.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_dump_schema.py
@@ -22,14 +22,13 @@
 from __future__ import annotations
 
 import logging
-from typing import List
 
 from .. import database
 
 _LOG = logging.getLogger(__name__)
 
 
-def migrate_dump_schema(repo: str, table: List[str]) -> None:
+def migrate_dump_schema(repo: str, table: list[str]) -> None:
     """Dump the schema of the registry database.
 
     Parameters
diff --git a/python/lsst/daf/butler_migrate/script/migrate_revision.py b/python/lsst/daf/butler_migrate/script/migrate_revision.py
index 93ac5a3..5b8bd92 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_revision.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_revision.py
@@ -25,7 +25,6 @@
 from __future__ import annotations
 
 import logging
-from typing import Optional
 
 from alembic import command, util
 from alembic.script import ScriptDirectory
@@ -89,7 +88,7 @@ def migrate_revision(mig_path: str, tree_name: str, manager_class: str, version:
     # New revision should be either at the head of manager branch or at the
     # root of the tree (to make a new manager branch).
     manager_branch = f"{tree_name}-{manager_class}"
-    branch_label: Optional[str] = None
+    branch_label: str | None = None
     splice = False
     if _revision_exists(scripts, manager_branch):
         head = f"{manager_branch}@head"
diff --git a/python/lsst/daf/butler_migrate/script/migrate_set_namespace.py b/python/lsst/daf/butler_migrate/script/migrate_set_namespace.py
index edfc55a..91c2dbc 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_set_namespace.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_set_namespace.py
@@ -25,14 +25,13 @@
 from __future__ import annotations
 
 import logging
-from typing import Dict, Optional
 
 from .. import butler_attributes, database
 
 _LOG = logging.getLogger(__name__)
 
 
-def migrate_set_namespace(repo: str, namespace: Optional[str], update: bool) -> None:
+def migrate_set_namespace(repo: str, namespace: str | None, update: bool) -> None:
     """Display current revisions for a database.
 
     Parameters
@@ -62,7 +61,7 @@ def migrate_set_namespace(repo: str, namespace: Optional[str], update: bool) ->
                 f"Namespace is already defined ({db_namespace}), use --update option to replace it."
             )
 
-        def update_namespace(config: Dict) -> Dict:
+        def update_namespace(config: dict) -> dict:
             """Update namespace attribute"""
             config["namespace"] = namespace
             return config
diff --git a/python/lsst/daf/butler_migrate/script/migrate_stamp.py b/python/lsst/daf/butler_migrate/script/migrate_stamp.py
index babffd3..fe076a5 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_stamp.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_stamp.py
@@ -25,7 +25,6 @@
 from __future__ import annotations
 
 import logging
-from typing import Dict, Optional
 
 from alembic import command
 
@@ -35,7 +34,7 @@
 
 
 def migrate_stamp(
-    repo: str, mig_path: str, purge: bool, dry_run: bool, namespace: Optional[str], manager: Optional[str]
+    repo: str, mig_path: str, purge: bool, dry_run: bool, namespace: str | None, manager: str | None
 ) -> None:
     """Stamp alembic revision table with current registry versions.
 
@@ -66,7 +65,7 @@ def migrate_stamp(
 
     manager_versions = db.manager_versions(namespace)
 
-    revisions: Dict[str, str] = {}
+    revisions: dict[str, str] = {}
     for mgr_name, (klass, version, rev_id) in manager_versions.items():
         _LOG.debug("found revision (%s, %s, %s) -> %s", mgr_name, klass, version, rev_id)
         revisions[mgr_name] = rev_id
diff --git a/python/lsst/daf/butler_migrate/script/migrate_trees.py b/python/lsst/daf/butler_migrate/script/migrate_trees.py
index 8003da2..efbe6fc 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_trees.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_trees.py
@@ -24,8 +24,6 @@
 
 from __future__ import annotations
 
-from typing import Dict
-
 from alembic.script import Script, ScriptDirectory
 
 from .. import config, migrate
@@ -51,7 +49,7 @@ def migrate_trees(mig_path: str, verbose: bool, one_shot: bool) -> None:
     scripts = ScriptDirectory.from_config(cfg)
     bases = scripts.get_bases()
 
-    bases_map: Dict[str, Script] = {}
+    bases_map: dict[str, Script] = {}
     for name in bases:
         revision = scripts.get_revision(name)
         assert revision is not None, "Script for a known base must exist"
diff --git a/python/lsst/daf/butler_migrate/script/migrate_upgrade.py b/python/lsst/daf/butler_migrate/script/migrate_upgrade.py
index 87cba7c..f9f198a 100644
--- a/python/lsst/daf/butler_migrate/script/migrate_upgrade.py
+++ b/python/lsst/daf/butler_migrate/script/migrate_upgrade.py
@@ -25,7 +25,6 @@
 from __future__ import annotations
 
 import logging
-from typing import Dict, Optional
 
 from alembic import command
 
@@ -40,8 +39,8 @@ def migrate_upgrade(
     mig_path: str,
     one_shot_tree: str,
     sql: bool,
-    namespace: Optional[str],
-    options: Optional[Dict[str, str]],
+    namespace: str | None,
+    options: dict[str, str] | None,
 ) -> None:
     """Upgrade schema to a specified revision.
 
@@ -77,7 +76,7 @@ def migrate_upgrade(
             "Alembic version table does not exist, you may need to run `butler migrate stamp` first."
         )
 
-    one_shot_arg: Optional[str] = None
+    one_shot_arg: str | None = None
     if one_shot_tree:
         one_shot_arg = one_shot_tree
     cfg = config.MigAlembicConfig.from_mig_path(
diff --git a/python/lsst/daf/butler_migrate/script/rewrite_sqlite_registry.py b/python/lsst/daf/butler_migrate/script/rewrite_sqlite_registry.py
index d32caaa..64cbb16 100644
--- a/python/lsst/daf/butler_migrate/script/rewrite_sqlite_registry.py
+++ b/python/lsst/daf/butler_migrate/script/rewrite_sqlite_registry.py
@@ -26,7 +26,6 @@
 import os
 import tempfile
 from collections import defaultdict
-from typing import Dict
 
 from lsst.daf.butler import Butler, Config, DatasetAssociation, DatasetId, DatasetRef, SkyPixDimension
 from lsst.daf.butler.datastores.fileDatastore import FileDatastore
@@ -55,7 +54,6 @@ def rewrite_sqlite_registry(source: str) -> None:
     source : `str`
         URI to a SQLite butler repository.
     """
-
     # Create the source butler early so we can ask it questions
     # without assuming things.
     source_butler = Butler(source, writeable=False)
@@ -88,22 +86,24 @@ def rewrite_sqlite_registry(source: str) -> None:
     # Force the new temporary butler repo to have an explicit path
     # to the existing datastore.  This will only work for a FileDatastore
     # so try that and if it doesn't work warn but continue since either
-    # this is a new typo of datastore or a chained datastore of some kind.
+    # this is a new type of datastore or a chained datastore of some kind.
     # For now only handle the simple case.
     # NOTE: Execution Butler creation has a similar problem with working
     # out how to refer back to the original datastore.
-    if isinstance(source_butler.datastore, FileDatastore):
-        config["datastore", "root"] = str(source_butler.datastore.root)
+    if isinstance(source_butler._datastore, FileDatastore):
+        roots = source_butler.get_datastore_roots()
+        datastore_name, datastore_root = roots.popitem()
+        config["datastore", "root"] = str(datastore_root)
 
         # Force the name of the datastore since that should not
         # change from the source (and will if set from root)
-        config["datastore", "name"] = source_butler.datastore.name
+        config["datastore", "name"] = datastore_name
     else:
         log.warning(
             "Migration is designed for FileDatastore but encountered %s."
             " Attempting migration anyhow. It should work so long as <butlerRoot> is not used"
             " in config.",
-            str(type(source_butler.datastore)),
+            str(type(source_butler._datastore)),
         )
 
     # Create a temp directory for the temporary butler (put it inside
@@ -167,9 +167,9 @@ def transfer_everything(source_butler: Butler, dest_butler: Butler) -> None:
 
     Parameters
     ----------
-    source_butler : `Butler`
+    source_butler : `~lsst.daf.butler.Butler`
         Butler to use as a source of information.
-    dest_butler : `Butler`
+    dest_butler : `~lsst.daf.butler.Butler`
         Butler to receive all the content.
     """
     # Read all the datasets we are going to transfer, removing duplicates.
@@ -193,7 +193,7 @@ def transfer_everything(source_butler: Butler, dest_butler: Butler) -> None:
 
 
 def create_associations(
-    source_butler: Butler, dest_butler: Butler, source_to_dest: Dict[DatasetId, DatasetRef]
+    source_butler: Butler, dest_butler: Butler, source_to_dest: dict[DatasetId, DatasetRef]
 ) -> None:
     """Create TAGGED and CALIBRATION collections in destination."""
     # For every dataset type in destination, get TAGGED and CALIBRATION
@@ -242,9 +242,9 @@ def transfer_non_datasets(source_butler: Butler, dest_butler: Butler) -> None:
 
     Parameters
     ----------
-    source_butler : `Butler`
+    source_butler : `~lsst.daf.butler.Butler`
         Butler to extract information from.
-    dest_butler : `Butler`
+    dest_butler : `~lsst.daf.butler.Butler`
         Destination butler.
     """
     # Use a string buffer to save on file I/O.  This might result in twice
diff --git a/tests/test_database.py b/tests/test_database.py
index e5a945a..b92636e 100644
--- a/tests/test_database.py
+++ b/tests/test_database.py
@@ -101,7 +101,6 @@ class DatabaseTestCase(unittest.TestCase):
 
     def test_manager_versions(self) -> None:
         """Test for manager_versions() method"""
-
         with make_revision_tables() as db_url:
             db = database.Database(db_url)
             manager_versions = db.manager_versions()
@@ -119,7 +118,6 @@ def test_manager_versions(self) -> None:
 
     def test_alembic_revisions(self) -> None:
         """Test for alembic_revisions() method"""
-
         with make_revision_tables() as db_url:
             db = database.Database(db_url)
             alembic_revisions = db.alembic_revisions()
@@ -133,7 +131,6 @@ def test_alembic_revisions(self) -> None:
 
     def test_validate_revisions(self) -> None:
         """Test for validate_revisions() method"""
-
         with make_revision_tables() as db_url:
             db = database.Database(db_url)
             db.validate_revisions()
diff --git a/tests/test_digests.py b/tests/test_digests.py
index 4af03fc..023ceab 100644
--- a/tests/test_digests.py
+++ b/tests/test_digests.py
@@ -30,7 +30,6 @@ class DigestsTestCase(unittest.TestCase):
 
     def test_tableSchemaRepr(self) -> None:
         """Test for _tableSchemaRepr method"""
-
         engine = sqlalchemy.create_engine("sqlite://")
 
         mdata = sqlalchemy.schema.MetaData()
@@ -58,7 +57,6 @@ def test_tableSchemaRepr_nullpk(self) -> None:
         """Test for _tableSchemaRepr method in case when PK is declared
         nullable.
         """
-
         engine = sqlalchemy.create_engine("sqlite://")
 
         # sqlalchemy allows nullable PK columns in table definition
diff --git a/tests/test_dimensions_json.py b/tests/test_dimensions_json.py
index ed407fb..4171e56 100644
--- a/tests/test_dimensions_json.py
+++ b/tests/test_dimensions_json.py
@@ -65,7 +65,7 @@ def make_butler_v0(self) -> Config:
 
     def load_data(self, registry: Registry, filename: str) -> None:
         """Load registry test data from filename in data folder."""
-        with open(os.path.join(TESTDIR, "data", filename), "r") as stream:
+        with open(os.path.join(TESTDIR, "data", filename)) as stream:
             backend = YamlRepoImportBackend(stream, registry)
         backend.register()
         backend.load(datastore=None)
diff --git a/tests/test_migrate.py b/tests/test_migrate.py
index 08a66a2..2991251 100644
--- a/tests/test_migrate.py
+++ b/tests/test_migrate.py
@@ -63,7 +63,6 @@ class MigrateTestCase(unittest.TestCase):
 
     def test_MigrationTrees(self) -> None:
         """Test for MigrationTrees methods"""
-
         with make_migrations() as mig_path:
             mtrees = migrate.MigrationTrees(mig_path)